Crystal Growth and Design p. 4925 - 4931 (2015)
Update date:2022-08-03
Topics:
Schütrumpf, Alexandra
Kirpi, Erdo?an
Bulut, Aysun
Morel, Flavien L.
Ranocchiari, Marco
Lork, Enno
Zorlu, Yunus
Grabowsky, Simon
Yücesan, Gündo?
Beckmann, Jens
The structural characterization of tetraphenylmethane tetrakis-4-phosphonic acid (4a) and its closely related Si-analogue tetraphenylsilane tetrakis-4-phosphonic acid (4b) is reported. Crystals of 4a, obtained by crystallization at 165 °C from water under hydrothermal conditions, comprise a dense threefold interpenetrated hydrogen-bonded network. Lower calculated density cocrystals 4b·4 EtOH, attained by recrystallization from ethanol, give rise to a porous honeycomb network that shows no interpenetration. Isolated from the mother liquor, the encapsulated ethanol is rapidly lost under ambient conditions leaving amorphous 4b. While the amorphous 4b is reasonably soluble in methanol, crystalline 4a is virtually insoluble in common organic solvents.
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